19858904

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{743}}^1$

素因数の和:1019

約数の個数: 32

約数和(自身を含む): 40309920

約数和(自身を除く): 20451016

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 257, 514, 743, 1028, 1486, 2056, 2972, 3341, 5944, 6682, 9659, 13364, 19318, 26728, 38636, 77272, 190951, 381902, 763804, 1527608, 2482363, 4964726, 9929452, 19858904]

約数ペア:

[(1, 19858904), (2, 9929452), (4, 4964726), (8, 2482363), (13, 1527608), (26, 763804), (52, 381902), (104, 190951), (257, 77272), (514, 38636), (743, 26728), (1028, 19318), (1486, 13364), (2056, 9659), (2972, 6682), (3341, 5944)]